Pressure reducing valve



March 13, 1934. J, JLAWLER 1,951,095

PRESSURE REDUCING VALVE Filed Oct. 29. 1951 Mcz v45 steam supply pipe 11 adjacent its point of con- Patentec Mar. 13, 1934 UNITED s'izrres earner ortica PRESSURE manucure VALVE .lames J. Lawler, Mount Vernon, N. Y., assigner to Lawler Automatic Controls, Inc., Mount `Vernon, N. Y., a corporation of New York Application October 29, 1931, Serial No. 571,82*?

3 Claims. (Cl. 236-42) This invention relates to certain new and useof the casing 15 is externally threaded for the ful improvements in pressure reducing valves. head or cap member' that comprises a horizontal The primary object of the invention is to prowall 17 carrying aninternallythreaded depending vide a pressure reducing valve preferably adapted annular ange 18 for threaded engagement with for association with a steam heating system of the upper end of the casing l5, the cap being 60 the one or two pipe character for regulating the provided with a central opening surrounded by pressure of steam delivered to a radiator or other an upstanding exteriorly threaded collar 19 for element, the reducing valve embodying a therattachment to the temperature control valve 14, mostatic element with whichA the steam flows in or by means of an elbow with the radiator. An contact for regulating the ow oi steam and annular valve seat 29 is disposed within the cas- 65 thereby controlling the pressure within a radiator ing l5 at the upper end of the connector 16 and or like device beyond the reducing valve. is surrounded by an annular channel 21 for pur- Wth the above and other objects in View that poses presently to appear. will become apparent as the nature of the in- The pressure reducing valve further includes a vention is better understood, the saine consists thermostatic member comprising inner and outer 70 in the novel form, combination and arrangement concentric walls 22 and 23 dening an annular of parts hereinafter more fully described, shown in channel 24, the channel being closed at its lower the accompanying drawing and claimed. end by a flanged cap 25 while the upper end ofl In the drawingzthe channel is closed by a flanged head 26. The

Figure 1 is a side elevational View of a two pipe flanged head 26 carries an upstanding plug 27 75 steam radiator wherein the radiator is equipped overlying the center channel within the inner anwith steam supply and return pipes with the nular member 22 and said plug has a threaded pressure reducing valve set into the steam supplyY socket therein with a bottom wall having an openppe; ing 28 closed by a gasket 29 that is engaged by a Figure 2 is a vertical cross-sectional view of screw plug 30. An expansible tube is located 80 the pressure reducing valve showing the thermowithin the center channel, the corrugated tube 3l static element therein for moving the valve tohaving its closed lower end 32 normally projecting ward its seat to regulate the amount or flow or' below the bottom cap 25 while the open upper steam therethrough whereby the pressure beyond end 33 of the tube is threaded into engagement 3o the valve may be regulated; with the inner face of the inner annular member 85 Figure 3 is a bottom plan view of the valve cas- 22 as at 33 with the open upper end of the exing cap; and pansible tube disposed below the openings 34 in Figure e is a fragmentary side elevational View, the inner annular member. The thermostatic partly in Section, Showing the pressure reducing device is charged with expansible fluid through 35 valve embodied in a one pipe steam heating systhe apertured plug 27, the fluid rst lling the 90 tem. expansible tube and then overowing through the Referring more in detail i0 the accompanying openings 34 into the annular channels 24. The drawing and particularly t0 Figures 1 to 3, the thermostatic element is retained at its limit of reference numeral 10 designates a steam radiupward movemen'fI Within the pressue reducing amr hal/'ing a Steam Supply pipe 11 Communicat' valve casing 15 by the coil spring 35 that is seated 95 ing with one endthereof and 9 Steam return, pipe at one end in the annular channel 2l of the valve ,11E attached to the. Otherl end gf the @chaton casing with the other end thereof engaged with err gell?elgnnaisgaggg og the lower end oi' the thermostatic element and as shown in Figure 3, the inner face of the wall 1'7 of the cap member of the valve casing is provided with radial ribs that is engaged by the upper may include a shut-off for automatic temperature en@ of th? thermostatc member element so that Control valve 14 the Valve 13 being provided a circulation of steam through the reducmg valve alone for the purpose of reducing steam pressure 1S Permltted at au times- 105 Within the redieteh The valve Within the casing 15 comprises the The pressure reducing valve comprises a bowl Valve body 37 having a SOCkeii 38 in its upper end shaped casing 15 having an internally threaded t0 receive the 10We1 DIOJ'eCtiDg end 32 0f the eX- 'nector 16 at its lower end for attachment pansble tube 31, the Valve member 37 being disto the steam supply pipe 11 while the upper end posed within the coil spring 35 and carrying upon 1 1() nection with the radiator and said steam supply pipe 11, outwardly of the pressure reducing valve its lower end a renewable valve face 39 retained in position by the screw pin 40.

Steam flows through the casing of the pressure reducing valve in the direction of the arrows shown in Figure 2,Y the steam passing over the valve seat 20, around the thermostaic element and between the head of lthe thermostatic element and the wall 17 of the casing cap to outlet through the collar 19 around the plug 27 for delivery to the radiator 10, heat from the machine causing the expansible fluid to expand which imparts expansive movement to the tube 3l for lowering Lthe valve body 37 toward the seat 20 against the pressure of steam flowing through the valve casing l5, the degree of pressure of steam to be delivered to the radiator being controlled by the amount of expansive iluid placed in the thermostatic element, the Valve member 37 never closing upon its seat 20, but approaching the same in response to action oi the expansible tube 3l for regulating the pressure of steam flowing throughY the valve casing. The pressure of steam supply from a source oi' energy is alway in excess of that required for heating purposes or the like and the installation of the pressure reducing valve reduces the pressure of steam supply to the point required, but this pressure reducing valve in no manner completely obstructs the flow of heating medium, its sole purpose being to reduce the pressure of Stearns-through the point required.

In the application of the invention as illustrated in Figure 4, the same is embodied in a one pipe steam heating system, the pipe 4l from a source of steam supply having an elbow tting 42 therein carrying an outlet pipe 43 for high pressure steam service, the pipe 4l outwardly of the elbow 42 having a pressure reducing valve 13a in communication therewith, the cap 17a for the valve casing 15a being closed at its upper end and said valve casing 15a. has a side outlet 19a connected toy a seam service pipe 44. The thermostatic element 23a is spring supported as at 35a with its valve body 37a spaced from the valve seat 20a. With this system, steam at high pressure may be utilized for certain purposes and the pressure reducing valve is employed for reducing the pressure of steam delivered to radiators or other elements where desired.

From the above detailed description of the in- Vention, it is believed that the construction and operation thereof will at once be apparent and while there are herein shown and described the preferred embodiments of the invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit andrscope of the invention as claimed.

I claimel. A pressure reducing valve comprising a casing having a valve seat atY its inlet end, a floating valve in the casing adjacent the seat and. a thermostatic element engageable with the valve forV moving the same towards its seat against fluid pressure through the casing, means for holding the thermostatic element engaged withY the end of the casing opposite the valve seat, said thermostatic element comprising a pair of spaced concentric walls defining an annular chamber and Ya central-passage, an expansible tube in the central passage engaged with the inner wall and having its closed lower end engaged with the valve and the open upper end in communication with the annular chamber at a point below the upper end of the annular chamber.

2. A pressure reducing valve comprising a casing having a valve seat at its inlet end, a oating valve.Y in the casing adjacent the seat and a thermostatic element engageable with the valve for moving the same towards its seat against fluid pressure through the casing, means for holding the thermostatic element engaged with the end of the casing opposite the valve seat, said thermostatic element comprising a pair of spaced concentric walls defining an annular chamber and a central passage, an eXpansible tube in the ceniral passage engaged with the inner wall and having it closed lower end engaged with the valve and the open upper end in communication with the annular chamber at a point below the upper end of the annular chamber, and a ller plug at the upper end of the thermostatic element above the central passage.

3. A pressure reducing valve comprising a casing having opposite inlet and outlet openings and a pressure reducing valve including a floating thermostatic element movable axially of the inlet and outlet openings, the thermostatic element including an outer annular stationary part and a central movable part with the movable part engaged with the valve, and a spring for holding the stationary part against movement.

JAMES JQ LAWLER.

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